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Kinematics of Stars in the Northern and Southern Galactic Hemispheres. / Vityazev, V. V.; Tsvetkov, A. S.

в: Astronomy Letters, Том 38, № 7, 2012, стр. 411–427.

Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование

Harvard

Vityazev, VV & Tsvetkov, AS 2012, 'Kinematics of Stars in the Northern and Southern Galactic Hemispheres', Astronomy Letters, Том. 38, № 7, стр. 411–427. https://doi.org/DOI: 10.1134/S1063773712060060

APA

Vityazev, V. V., & Tsvetkov, A. S. (2012). Kinematics of Stars in the Northern and Southern Galactic Hemispheres. Astronomy Letters, 38(7), 411–427. https://doi.org/DOI: 10.1134/S1063773712060060

Vancouver

Vityazev VV, Tsvetkov AS. Kinematics of Stars in the Northern and Southern Galactic Hemispheres. Astronomy Letters. 2012;38(7):411–427. https://doi.org/DOI: 10.1134/S1063773712060060

Author

Vityazev, V. V. ; Tsvetkov, A. S. / Kinematics of Stars in the Northern and Southern Galactic Hemispheres. в: Astronomy Letters. 2012 ; Том 38, № 7. стр. 411–427.

BibTeX

@article{0643bd3770bc4d72becea2d3a162f391,
title = "Kinematics of Stars in the Northern and Southern Galactic Hemispheres",
abstract = "We use vector spherical harmonics for a kinematic analysis of the proper motions of stars from the Hipparcos, Tycho-2, and UCAC3 catalogues in the northern and southern Galactic hemispheres. We have found that the statistically reliable values of the Ogorodnikov–Milne model parametersM+ 32 andM − 32 have different signs in different hemispheres. This is a consequence of the Galaxy{\textquoteright}s rotational retardation with distance from the principal Galactic plane. Based on various samples of stars from the above catalogues, we have obtained the following estimate for the magnitude of the vertical gradient of Galactic rotation velocity in the solar neighborhoods: (20.1 ± 2.9) <|∂V/∂z| <(49.2 ± 0.8) km s−1 kpc−1. Another result that is revealed by our analysis of the parameters M − 13 and M+ 13 in different Galactic hemispheres is that the vertical gradient of expansion velocity for the stellar system ∂VR/∂z is positive in the northern hemisphere and negative in the southern one. This suggests that the expansion velocit",
keywords = "all-sky star catalogues, stellar proper motions, Galactic kinematics, vector spherical harmonics",
author = "Vityazev, {V. V.} and Tsvetkov, {A. S.}",
year = "2012",
doi = "DOI: 10.1134/S1063773712060060",
language = "English",
volume = "38",
pages = "411–427",
journal = "Astronomy Letters",
issn = "1063-7737",
publisher = "МАИК {"}Наука/Интерпериодика{"}",
number = "7",

}

RIS

TY - JOUR

T1 - Kinematics of Stars in the Northern and Southern Galactic Hemispheres

AU - Vityazev, V. V.

AU - Tsvetkov, A. S.

PY - 2012

Y1 - 2012

N2 - We use vector spherical harmonics for a kinematic analysis of the proper motions of stars from the Hipparcos, Tycho-2, and UCAC3 catalogues in the northern and southern Galactic hemispheres. We have found that the statistically reliable values of the Ogorodnikov–Milne model parametersM+ 32 andM − 32 have different signs in different hemispheres. This is a consequence of the Galaxy’s rotational retardation with distance from the principal Galactic plane. Based on various samples of stars from the above catalogues, we have obtained the following estimate for the magnitude of the vertical gradient of Galactic rotation velocity in the solar neighborhoods: (20.1 ± 2.9) <|∂V/∂z| <(49.2 ± 0.8) km s−1 kpc−1. Another result that is revealed by our analysis of the parameters M − 13 and M+ 13 in different Galactic hemispheres is that the vertical gradient of expansion velocity for the stellar system ∂VR/∂z is positive in the northern hemisphere and negative in the southern one. This suggests that the expansion velocit

AB - We use vector spherical harmonics for a kinematic analysis of the proper motions of stars from the Hipparcos, Tycho-2, and UCAC3 catalogues in the northern and southern Galactic hemispheres. We have found that the statistically reliable values of the Ogorodnikov–Milne model parametersM+ 32 andM − 32 have different signs in different hemispheres. This is a consequence of the Galaxy’s rotational retardation with distance from the principal Galactic plane. Based on various samples of stars from the above catalogues, we have obtained the following estimate for the magnitude of the vertical gradient of Galactic rotation velocity in the solar neighborhoods: (20.1 ± 2.9) <|∂V/∂z| <(49.2 ± 0.8) km s−1 kpc−1. Another result that is revealed by our analysis of the parameters M − 13 and M+ 13 in different Galactic hemispheres is that the vertical gradient of expansion velocity for the stellar system ∂VR/∂z is positive in the northern hemisphere and negative in the southern one. This suggests that the expansion velocit

KW - all-sky star catalogues

KW - stellar proper motions

KW - Galactic kinematics

KW - vector spherical harmonics

U2 - DOI: 10.1134/S1063773712060060

DO - DOI: 10.1134/S1063773712060060

M3 - Article

VL - 38

SP - 411

EP - 427

JO - Astronomy Letters

JF - Astronomy Letters

SN - 1063-7737

IS - 7

ER -

ID: 5384237